198 



LIEUT.-COLONEL SYKES ON THE ATMOSPHERIC TIDES 



Table II. — Mean diurnal and nocturnal oscillations of the barometer, and difference 

 tioned places within the Northern Tropic on the Continent of India ; reduced 



Calcutta, 

 1829, 1830, 1831. 



Fall from 9h. 40m, 

 to 4 P.M. 



Barom. 



Therm, 

 attached. 



Madras, maximum and minimum 

 every tenth day, 1823. 



Fall from 9—10 

 A.M. to 4—5 P.M 



Barom. Therm, 

 attached 



FaU from 10 P.M. 

 to 5 A.M. 



Barom. 



Therm, 

 attached. 



Bombay, 1829. 



Fall from 9 A.M. 

 to 3 P.M. 



Barom. 'i?^^j 

 attached. 



Poona, 1830. 1823 feet above the level of the sea. 



Hill Fort of Hurreechundurghur, 1829. 



3900 feet above the level 



of the sea. 



Fall from 9— 10 A.M. 

 to 4—5 P.M. 



Barom. 



Therm, 

 attached 



Rise from 4—5 P.M. 

 to 10—11 P.M. 



Rise from sunrise 

 to 9— 10 A.M. 



Barom. 



Therm, 

 attached 



Barom. 



Therm, 

 attached. 



Rise from sunrise 

 to 9—10 A.M. 



Barom. 



Therm, 

 attached. 



Fall from 9-10 A.M 

 to 4—5 P.M. 



Barom. 



Therm, 

 attached. 



-123 

 —117 



-•125 



-•124 



-•115 

 -•095 

 -•090 

 -•099 

 -•101 

 -110 

 -•107 

 -•114 



-•110 



+20-7 

 +18-5 



-I- 14-0 

 + 14^6 



+13^7 

 + 7-6 

 + 61 

 + 5^9 

 + 62 

 + 8-4 

 +134 

 +17^1 



+122 



072 

 -•070 



—076 



1—081 



-•081 



-•092 



-•097 



-•105 



-•094 



068 



071 



071 



+ 11^0 

 +10-0 



+ 7^0 



+ 9-0 



+ 9-0 



+ 9-0 



+ 7-0 



+ 7-0 



+ 6^0 



+ 8^0 



+ 8-0 



+ 9-0 



-•079 + 8-5 



-•004 

 •029 



•026 



-•027 



-•014 

 -•026 

 -•009 

 -•028 

 -•024 

 -033 

 010 

 019 



•021 



-•099 



-•091 



-•1123 

 -•102 



+5-4 

 +3-7 



t- 



•0836 

 •089 



•071 



•054 



•046 



•063 



•074 



^-•1141 



-•075 



+7-6 



+4 



•"} 



+0-51 



+3-1 ; 



+23 



+2^2 

 + 12 



+ 1^4 

 +2-1 



+8^48 



+2-82 



-•136 

 -140 



-133 



-143 



-132 

 -•106 

 -•075 

 -•085 

 -•090 

 -125 

 -•125 

 -•110 



-•1166 



+ 5^8 



+ 6-5 



+ 9^8 



+ 7-7 



+ 5^8 



+ 3-7 



+ M 



■f- 2-3 



+ 2^1 



+ 2-9 



+ 6^5 



+ 4^9 



+•088 

 +•097 



+•108 



+•114 

 +•105 

 +•094 



+•082 

 +•074 

 +•084 

 +•082 

 +•045 



+ 4^9 +^0884 



- 8-1 

 -12-7 



-IM 



- 9-0 



- 74 



- 30 

 4-5 



- 47 



- 4^1 



- 8-2 



- 6-3 



72 



•0234 

 •0363 

 •0251 

 •0330 

 •0350 

 •0364 

 •0399 



2-74 

 251 

 307 

 475 

 5-56 

 6-53 

 8-72 



•0437 



•0514 

 •0514 



9-57 



10-91 

 10^54 



•1024 



•0981 

 •0903 



4-25 



3-68 

 2-42 



•0488 



10-34 



•0969 



3-45 



The Calcutta observations were made in the Surveyor- General's office ; those at Madras, by Mr. Golding- 

 HAM, at the Observatory ; in Bombay, by Captain George Jervis, at the Engineer Institution ; at Poona and 



• Ten days' observations in Bombaj, in 1828, made by Colonel Stkes from 9 — 10 a.m. to 4 — 5 p.m.: Rise from sunrise to 

 9—10 A.M. •0360; Therm. +8°^92. 



t April 1827, in Bombay. — Observations made by Colonel Stkes, in tents, from 9 — 10 a.m. to 4 — 5 p.m. : Rise from sunrise to 

 9— 10a.m.^0645; Therm. +100^05. 



f Observations made in Bombay, 1828, by Colonel Svkes, from 9— 10 a.m. to 4 — 5 p.m.: Rise from sunrise to 9— 10 a.m. •0530 j 

 Therm. +7°-8, intents. 



